OK, I'm misunderstood. Thanks for your suggestion.
We will see, if more people ask for this.

My request is not about the length of the paths. I would like to see in the window if the data is synchronized to the server or on the computer(local) or both directions.

It can happen quickly that you start a synchronization that runs in the wrong direction (wrong target), but you don't notice it anymore because in the small window the direction of the synchronization is no longer named.

Coincidentally, I was just working on this:
Issue 2043 – Improve shortening long paths, when single level name is too long on its own
(at least I assume that you have this problem)

I'm sending you an email with a development version of WinSCP to the address you have used to register on this forum.

If you want to synchronize server and local, you can do it in one or both directions. The small window that then appears ("Comparing") unfortunately no longer shows which direction is being processed, which sometimes gives you an uneasy feeling.

I would appreciate it very much, if during the processing of the data would be displayed, what the target is. Especially if you let it replace directly without the overview.

In this window is local the target, I hope so :D

Maybe, it would be enough to write in the window-title like:

• Comparing – Prepare download
  
• Comparing – Prepare upload
  
• Comparing – fit both sides